.game-form .submit-form{
    margin-top: 10px;
    padding: 0.6em 3em;
}

#game_end_modal .modal-dialog{
    top: 50%;
}

@media all and (max-width: 600px){
    .game-form .submit-form{
        margin-top: 6px;
    }

    #game_end_modal .modal-content{
        margin-top: -10%;
    }
}